Guy's the fire suppresion debate is interesting as it is not even mandated in EU registered pax aircraft I looked into this when I was a QA consultant for a well known Dutch MRO and it became clear that aircraft of a certain vintage (think F100 age) did not have to have either smoke detectors or fire suppresion systems in the lower baggage holds! it was a situation that I found incredible even after more than 30 years in this business some things just astound you as IMO all aircraft either pax or cargo should be mandated to have both.